-23.88% is the change from 67 to 51
Calculation steps:
[( 51 - 67 ) ÷ 67] x 100 = -23.88%
Formula
Percentage change = [(51 - 67) / 67] x 100
Subtract the new number by the original number
51 - 67 = -16
-16 ÷ 67 = -0.23880597014925373
-0.23880597014925373 x 100 = -23.88%